26388782563 has 16 divisors (see below), whose sum is σ = 31758364512. Its totient is φ = 21604320000.

The previous prime is 26388782557. The next prime is 26388782591. The reversal of 26388782563 is 36528788362.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26388782563 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26388782498 and 26388782507.

It is not an unprimeable number, because it can be changed into a prime (26388782513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2244588 + ... + 2256313.

It is an arithmetic number, because the mean of its divisors is an integer number (1984897782).

Almost surely, 2^26388782563 is an apocalyptic number.

26388782563 is a deficient number, since it is larger than the sum of its proper divisors (5369581949).

26388782563 is a wasteful number, since it uses less digits than its factorization.

26388782563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4500966.

The product of its digits is 23224320, while the sum is 58.

The spelling of 26388782563 in words is "twenty-six billion, three hundred eighty-eight million, seven hundred eighty-two thousand, five hundred sixty-three".